668431 divided by 87 
We want to divide 668431 by 87.

Moving on to step 1:
If we divide 6 by 87, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 87

Moving on to step 2:
If we divide 66 by 87, we get 0 and a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Bring next digit (8) of the dividend behind the 66 and repeat the process: 668 / 87

Step 3:
The number 87 fits into 668 7 times, leaving a remainder of 59.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 609 from 668 leaves us with 59.
Append the next digit (4) from the dividend to 59 and continue with: 594 / 87

Moving on to step 4:
If we divide 594 by 87, we get 6 and a remainder of 72.
Put 6 as the next digit of the answer. 
Result so far: 76.0
If we take 522 away from 594, we end up with 72.
Append the next digit (3) from the dividend to 72 and continue with: 723 / 87

Moving on to step 5:
When dividing 723 by 87, we get 8 with a remainder of 27.
Put 8 as the next digit of the answer. 
Result so far: 768.0
Deduct 696 from 723 and we're left with 27.
Take the next digit (1) from the dividend and append it to 27, then repeat: 271 / 87

Going ahead to step 6:
When dividing 271 by 87, we get 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 7683.0
Subtract 261 from 271 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
If we divide 100 by 87, we get 1 and a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 7683.1
If we take 87 away from 100, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 8:
87 can be fit into 130 1 times, resulting in a remainder of 43.
Use 1 as the next digit of our solution. 
Result so far: 7683.11
If we subtract 87 from 130, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Our division results in 7683.11 with a remaining 0.043.